METHOD OF GENERATING ELECTROMAGNETIC RADIATION IN TERAHERTZ RANGE AND APPARATUS FOR GENERATING ELECTROMAGNETIC RADIATION IN TERAHERTZ RANGE Russian patent published in 2015 - IPC G02F1/00 H01S3/94 

FIELD: physics, optics.

SUBSTANCE: invention relates to optoelectronics. The method of generating electromagnetic radiation in the terahertz range comprises interaction of directed exciting radiation with the active medium of a sample and obtaining secondary electromagnetic radiation. The active medium of the sample used is material with topological insulator properties, wherein excitation is carried out with pulsed radiation with exciting pulse duration τ=10^-12-10^-14 s, pulse energy E_pul=10^-5-10^-2 J and wavelength λ_exc=350-5000 nm, wherein the exciting radiation is directed on the plane of the sample with active medium at an angle α≠90°. The active medium used can be a thin film or crystal of bismuth selenide (Bi₂Se₃) or bismuth telluride (Bi₂Te₃). The detecting element used can be zinc telluride (ZnTe).

EFFECT: enabling monitoring and control of generation parameters when exciting materials with topological insulator properties.

5 cl, 2 dwg